Patent US3282835A successfully refreshed from Google Patents.
Patent US2820797A successfully refreshed from Google Patents.
US2820797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition compound of nitrophenyl phthalimidopropanolal and phthalimidoacetaldehyde and preparation thereof
Assignee: Parke Davis and Co LLC
•
Filing: 1952-04-07
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Granted: 1958-01-21
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Expires: 1972-04-07
Abstract
No abstract record available.
Inventors
- 👤 Jacob Robert Michel
- 👤 Robert Jacques Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:39
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
PROCESS FOR OBTAINING AN ADDITION PRODUCT OF THE ADOL NO2-C6H4-CHOH-CH-CHO
Claim 2
Dependent Claim
10 words
PROCESS FOR OBTAINING AN ADDITION PRODUCT OF THE ADOL NO2-C6H4-CHOH-CH-CHO
Claim 3
Dependent Claim
16 words
A COMPOSITION CONSISTING OF AN ADDITION PRODUCT WITH A-PHTHALIMIDOACETALDEHYDE OF THE ALDOL HAVING THE FORMULA NO2-C6H4-CHOH-CH-CHO
Claim 4
Dependent Claim
16 words
A COMPOSITION CONSISTING OF AN ADDITION PRODUCT WITH A-PHTHALIMIDOACETALDEHYDE OF THE ALDOL HAVING THE FORMULA NO2-C6H4-CHOH-CH-CHO
References Cited (Backward Citations)
US2628975A
Cited
US2677704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |